Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K9/00—Medicinal preparations characterised by special physical form
  • A61K9/08—Solutions
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/33—Heterocyclic compounds
  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
  • A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K9/00—Medicinal preparations characterised by special physical form
  • A61K9/0012—Galenical forms characterised by the site of application
  • A61K9/0043—Nose
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K9/00—Medicinal preparations characterised by special physical form
  • A61K9/0012—Galenical forms characterised by the site of application
  • A61K9/0048—Eye, e.g. artificial tears
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P27/00—Drugs for disorders of the senses
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P37/00—Drugs for immunological or allergic disorders
  • A61P37/08—Antiallergic agents
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
  • A61K47/02—Inorganic compounds
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
  • A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
  • A61K47/08—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite containing oxygen, e.g. ethers, acetals, ketones, quinones, aldehydes, peroxides
  • A61K47/10—Alcohols; Phenols; Salts thereof, e.g. glycerol; Polyethylene glycols [PEG]; Poloxamers; PEG/POE alkyl ethers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
  • A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
  • A61K47/26—Carbohydrates, e.g. sugar alcohols, amino sugars, nucleic acids, mono-, di- or oligo-saccharides; Derivatives thereof, e.g. polysorbates, sorbitan fatty acid esters or glycyrrhizin

Definitions

• This invention relates to an aqueous preparation of an anti-allergic drug, and specifically, to an aqueous preparation, particularly an eye drop, a nasal drop or a paint, comprising a pyrido[1,2-a]pyrimidine compound.
• Pyrido[1,2-a]pyrimidine compounds are described in Japanese Laid-Open Patent Publication Nos. 242682/1987, 183581/1988 and 246375/1988 and are known to have a strong action of inhibiting Leukotriene D 4 which is a typical active substance of a slow reacting substance of anaphylaxis (SRS-A) and to suppress or prevent conditions of allergic reactions such as SRS-A induced I-type allergic rhinitis.
• SRS-A anaphylaxis
• Anti-allergic agents now on the market are mainly for oral administration designed for systemic action.
• orally administrable agents are not necessarily a suitable form of administration for patients of allergic ophthalmia, rhinitis or dermatitis, particularly infants and young children, because of their side-effects.
• an effective form of administration would be a local therapeutic agent, for example, an eye drop for allergic ophthalmia, a nasal drop for allergic rhinitis and a paint for allergic dermatitis.
• the aqueous preparation should meet certain requirements. For example, it should be in the form of an aqueous solution. It should be germ-free. It should not contain foreign matter. The tonicity and pH value of the agent should not be much different from those of a body fluid at the site of application. It should not irritate the sites of application, for example, the mucosa of the eye, the mucosa of the nose, or the skin. Furthermore, it should be physically and chemically stable during long-term storage.
• the pyrido[1,2-a]pyrimidine compound has a low solubility in water.
• 9-[(4-acetyl-3-hydroxy-2-n-propylphenoxy)methyl]-3-(1H-tetrazol-5-yl)-4H-pyrido[1,2-a]pyrimidin-4-one (to be referred to as AS-35) has a solubility in water of 0.4 ug/ml.
• AS-35 9-[(4-acetyl-3-hydroxy-2-n-propylphenoxy)methyl]-3-(1H-tetrazol-5-yl)-4H-pyrido[1,2-a]pyrimidin-4-one
• AS-35 9-[(4-acetyl-3-hydroxy-2-n-propylphenoxy)methyl]-3-(1H-tetrazol-5-yl)-4H-pyrido[1,2-a]pyrimidin-4-one
• AS-35 9-[(4-acety
• a dissolving adjuvant such as polyoxyethylene hydrogenated castor oil, a polyoxyethylene sorbitan fatty acid ester, polyoxyl 40 stearate, polyethylene glycol, glycerol, 2-octyldodecanol, diisopropanolamine, triethanolamine, trisaminomethane, meglumine or diethanolamine was added, AS-35 could not be dissolved with any of these adjuvants.
• the present invention provides an aqueous preparation comprising 0.1 to 0.3% (W/V) of a pyrido[1,2-a]pyrimidine compound represented by the following formula: ##STR2## wherein R represents an n-propyl or allyl group, A represents a tetrazolyl or carboxyl group, and n represents an integer of 0 to 2, 0.5 to 2.0% (W/V) of a polyoxyethylene sorbitan fatty acid ester, 0.5 to 2.0% (W/V) of polyethylene glycol and 1.0 to 3.5% (W/V) of disodium hydrogenphosphate.
• R represents an n-propyl or allyl group
• A represents a tetrazolyl or carboxyl group
• n represents an integer of 0 to 2
• 0.5 to 2.0% (W/V) of a polyoxyethylene sorbitan fatty acid ester 0.5 to 2.0% (W/V) of polyethylene glycol and 1.0 to 3.5% (W/V)
• Examples of the pyrido[1,2-a]pyrimidine compounds include 3-[9-(4-acetyl-3-hydroxy-2-n-propylphenoxymethyl)-4-oxo-pyrido[1,2-a]pyrimidin-3-yl]propionic acid (to be referred to as AS-152), 9-[(4-acetyl-3-hydroxy-2-n-propylphenoxy)methyl]-3-[(1H-tetrazol-5-yl)methyl]-4H-pyrido[1,2-a]pyrimidin-4-one (to be referred to as AS-174) and 9-[(4-acetyl-3-hydroxy-2-allylphenoxy)methyl]-3-(1H-tetrazol-5-yl)-4H-pyrido[1,2-a]pyrimidin-4-one (to be referred to as AS-168) in addition to AS-35, AS-148 and AS-163.
• AS-148 and AS-152 will be generically called the carboxylic acid type
• polysorbate examples include polyoxyethylene sorbitan monopalmitate (to be referred to as polysorbate 40), polyoxyethylene sorbitan monostearate (to be referred to as polysorbate 60), polyoxyethylene sorbitan tristearate (to be referred to as polysorbate 65), and polyoxyethylene sorbitan monooleate (to be referred to as polysorbate 80).
• PEG examples include polyethylene glycol 200 (to be referred to as PEG 200), polyethylene glycol 300 (to be referred to as PEG 300), polyethylene glycol 400 (to be referred to as PEG 400), polyethylene glycol 600 (to be referred to as PEG 600), polyethylene glycol 1000 (to be referred to as PEG 1000), polyethylene glycol 1500 (to be referred to as PEG 1500), polyethylene glycol 1540 (to be referred to as PEG 1540), polyethylene glycol 4000 (to be referred to as PEG 4000), polyethylene glycol 6000 (to be referred to as PEG 6000), polyethylene glycol 20000 (to be referred to as PEG 20000).
• an antiseptic such as parahydroxybenzoic acid ester, benzethonium chloride, sodium dehydroacetate, chlorobutanol, phenylethyl alcohol or potassium sorbate, or an isotonizing agent such as sodium chloride, potassium chloride, sodium citrate or sodium acetate
• an antiseptic such as parahydroxybenzoic acid ester, benzethonium chloride, sodium dehydroacetate, chlorobutanol, phenylethyl alcohol or potassium sorbate, or an isotonizing agent such as sodium chloride, potassium chloride, sodium citrate or sodium acetate
• the aqueous preparation of this invention is suitable as an eye drop, a nasal drop and a paint, and may also be utilized in a liquid preparation such as an injectable solution, an inhalant or an ear drop.
• the aqueous preparation of this invention does not precipitate crystals nor does the decomposition of the pyrido[1,2-a]pyrimidine compound occurs even when it is allowed to stand in a cold place for a long period of time.
• this aqueous preparation has quite excellent storage stability.
• the aqueous preparation of this invention is suitable as an eye drop, a nasal drop and a paint because it has a pH stabilized within a range of 8.3 to 8.4, is free from irritation of the mucosa of the eye and nose and also free from skin irritation, and remains stable even when allowed to stand in an open state.
• the solubility of crystals and the precipitation of crystals were evaluated by the visual inspection method described in the Japanese Pharmacopoeia. Specifically, samples are filled into tightly-stoppered glass container and allowed to stand. It was observed at a position having a brightness of 3000 to 5000 lux using a source of white light. When the crystals did not dissolve and when crystals precipitated, the results were rated as +. When the crystals dissolved and when precipitation of the crystals was not seen, the results were rated as -.
• the sterile purified water mentioned hereinafter denotes water obtained by heat sterile purified water in an autoclave at 121° C. for 20 minutes.
• AS-35, AS-163 or AS-148 was suspended in sterile purified water to a concentration of 0.1% (W/V) or 0.2% (W/V), and a suitable amount of 1N sodium hydroxide solution was added in order to dissolve AS-35, AS-163 or AS-148. The solution was allowed to stand at room temperature. At any of the concentrations, AS-35, AS-163 or AS-148 dissolved, but the solutions has a pH of as high as 11.0 and became gel-like.
• organic amine-type dissolving adjuvant diisopropanolamine, triethanolamine, trisaminomethane, meglumine or diethanolamine (0.5 g) was dissolved in sterile purified water, and 0.2 g of AS-35 was added to form 100 ml of a mixture. In any case, AS-35 was not dissolved. When the same operation as above was repeated using AS-163 and AS-148, they were not dissolved in any of the cases.
• AS-35 (0.2 g) and 2.0 g of polysorbate 80 and 2.0 g of PEG 400 were heat-melted, and under heat with stirring the Palitzsch's buffer solution or the Gifford's buffer solution was added to form 100 ml of a mixture. When it was well shaken and allowed to stand at room temperature, AS-35 was not dissolved in any of the cases.
• AS-35, AS-163 or AS-148 (0.1 g) and polysorbate 80 (2.0 g) and PEG 400 (2.0 g) were mixed and uniformly dispersed, and a 3.0% (W/V) sterile purified water solution of an alkali salt was added to the dispersion to prepare 100 ml of a mixture. The mixture was shaken and allowed to stand at room temperature. The results are shown in the following table.
• Aqueous preparations containing 0.2% (W/V) of AS-35, 2.0% (W/V) of PEG 400, 3.0% (W/V) of disodium hydrogenphosphate and 2.0% (W/V) of polysorbate 40, polysorbate 60 or polysorbate 65 as the polysorbate as the polysorbate were prepared, placed in the tightly-stoppered glass and stored.
• aqueous preparations containing 0.2% (W/V) of AS-35, 2.0% (W/V) of polysorbate 80, 3.0% (W/V) of disodium hydrogenphosphate and 2.0% (W/V) of PEG 200, PEG 300, PEG 400, PEG 600, PEG 1000, PEG 1500, PEG 1540, PEG 4000, PEG 6000, or PEG 20000 were prepared and stored at the temperatures indicated in Table 3 for 8 months in a tightly-stoppered state. These aqueous preparations were observed. No precipitation of crystals was noted, and no dissimilar spots were noted on TLC.
• Aqueous preparations containing 2.0% (W/V) of polysorbate 80, 2.0% (W/V) of PEG, 3.0% (W/V) of disodium hydrogenphosphate and 0.2% (W/V) of AS-148, AS-152, AS-163, AS-174 or AS-168 as the pyrido[1,2-a]pyrimidine compound were prepared, and stored under the conditions shown in Table 3 for 8 months in a tightly-stoppered state. The stored preparations were observed, but no precipitation of crystals was noted. No dissimilar spots were noted on TLC.
• the glass containers which contained samples 3 and 5 were opened after the lapse of 8 months, and these samples were stored at room temperature thereafter. No crystal precipitated after the lapse of 7 days, and no dissimilar spots were noted on TLC.
• Example 1 One drop of the eye drop of Example 1 was applied to the eye, and after the lapse of 30 minutes, the number of blinkings per minute was measured. Then the eye drop was applied 10 times at an interval of 30 minutes, and the irritation of the eye drop to the cornea, iris and conjunctiva was evaluated by the Draiz method (New Toxicity Testing Method-Method and Evaluation, page 337, Feb. 28, 1987, published by K. K. REALIZE). The results are shown in the following table.
• Example 2 0.05 ml of the nasal drop of Example 2 was sprayed to the inside of the nasal cavity of rabbit for one week at a rate of 3 times a day.
• the epithelial tissues of the mucosa of the inside of the nasal cavity were observed under an optical microscope and an electron microscope. As compared with the control, no abnormality was noted.
• Example 3 The paint of Example 3 (0.5 ml) was applied to the back of a rabbit for four days at a rate of two times a day, and then a skin irritation test was conducted on it by the Federal Register method (New toxicity Testing Method-Method and Evaluation page 336, Feb. 28, 1987, K. K. REALIZE). No abnormality was noted as compared with the control.
• aqueous preparations of the present invention which are formulated so as to contain the pyrido[1,2-a]pyrimidine compound, polysorbate, polyethylene glycol and disodium hydrogenphospate in a concentration of 0.1-0.3% (W/V), 0.5-0.2% (W/V), 0.5-2.0% (W/V) and 1.0-3.5% (W/V), respectively, an aqueous preparation can be prepared in which the pyrido[1,2-a]pyrimidine compound, a difficultly-soluble drug, is dissolved in a high concentration to a suitable consistency at a pH close to the pH of a body fluid, crystals do not precipitate for a long period of time nor the pyrido[1,2-a]pyrimidine compound undergoes decomposition even when the preparation is stored at room temperature or in a cold place (5° C.), and which, moreover, does not cause local irritation. Furthermore, since the aqueous preparation of the invention is stable even in an open state, it is especially useful as an eye drop
• Polysorbate 80 (20 g) and PEG 400 (20 g) were added to AS-35 (1.0 g) and uniformly dispersed.
• a solution of disodium hydrogenphosphate (30 g) and potassium sorbate (1.0 g) in sterile purified water was added further to give 1000 ml of a solution which had a pH of 8.3.
• This solution was filtered by using a 0.22 um membrane filter to give a 0.1% (W/V) solution of AS-35.
• the solution was filled in an eye drop container to produce an eye drop.
• Polysorbate 80 (20 g) and PEG 400 (20 g) were added to AS-35 (1.0 g) and uniformly dispersed.
• a solution of disodium hydrogenphosphate (30 g) and potassium sorbate (1.0 g) in sterile purified water was added to form 1000 ml of a solution having a pH of 8.3.
• This solution was filtered by using a 0.22 um membrane filter to form a 0.1% (W/V) solution of AS-35.
• the solution was filled in a spray-type nasal drop container to produce a nasal drop.
• Polysorbate 80 (20 g) and PEG 400 (20 g) were added to AS-35 (2.0 g), and uniformly dispersed.
• a solution of disodium hydrogenphosphate (30 g) and sodium dehydroacetate (1.0 g) in sterile purified water was added to form 1000 ml of a solution.
• the solution was filtered by using a 0.22 um membrane filter to give a 0.2% (W/V) solution of AS-35. This solution was filled in a plastic painting container with a sponge to produce a paint.
• Polysorbate 80 (20 g) and PEG 1500 (15 g) were added to AS-148 (1.0 g) and dispersed uniformly.
• a solution of disodium hydrogenphosphate (25 g) and potassium sorbate (1.0 g) in sterile purified water was added to give 1000 ml of a solution.
• This solution was filtered through a 0.22 um membrane filter to form a 0.1% (W/V) solution of AS-148. This solution was filled in an eye drop container to produce an eye drop.
• Polysorbate 65 (20 g) and PEG 4000 (15 g) were added to AS-148 (1.0 g) and uniformly dispersed.
• a solution of disodium hydrogenphosphate (30 g) and potassium sorbate (1.9 g) in sterile purified water was added to form 1000 ml of a solution.
• This solution was filtered by using a 0.22 um membrane filter to form a 0.1% (W/V) solution of AS-148.
• the solution was filled in a spray-type nasal drop container to produce a nasal drop.
• Polysorbate 65 (20 g) and PEG 4000 (15 g) were added to AS-163 (1.0 g) and dispersed uniformly.
• a solution of disodium hydrogenphosphate (25 g) and potassium sorbate (1.0 g) in sterile purified water was added to give 1000 ml of a solution.
• This solution was filtered through a 0.22 um membrane filter to form a 0.1% (W/V) solution of AS-163. This solution was filled in an eye drop container to produce an eye drop.
• Polysorbate 80 (15 g) and PEG 4000 (20 g) were added to AS-174 (1.0 g) and uniformly dispersed. To the dispersion was added a solution of disodium hydrogenphosphate (30 g) and potassium sorbate (1.0 g) in sterile purified water. Sterile purified water was further added to form 1000 ml of a solution. This solution was filtered by using a 0.22 um membrane filter to form a 0.1% (W/V) solution of AS-174. The solution was filled in a spray-type nasal drop container to produce a nasal drop.
• Polysorbate 60 (20 g) and PEG 300 (20 g) were added to AS-168 (2.0 g) and uniformly dispersed.
• a solution of disodium hydrogenphosphate (35 g) and sodium dehydroacetate (1.0 g) in sterile purified water was added to form 1000 ml of a solution.
• This solution was filtered through a 0.22 um membrane filter to form a 0.2% (W/V) of AS-168.
• the solution was filled in a plastic painting container with a sponge to produce a paint.
• Polysorbate 80 (20 g) and PEG 4000 (20 g) were added to AS-152 (1.0 g) and dispersed uniformly.
• a solution of disodium hydrogenphosphate (20 g) and potassium sorbate (1.0 g) in sterile purified water was added to give 1000 ml of a solution.
• This solution was filtered through a 0.22 um membrane filter to form a 0.1% (W/V) solution of AS-152. This solution was filled in an eye drop container to produce an eye drop.

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• 1989
  • 1989-06-09 JP JP1145201A patent/JPH0311016A/ja active Pending
• 1990
  • 1990-03-19 AU AU51407/90A patent/AU617933B2/en not_active Ceased
  • 1990-03-26 CA CA002013017A patent/CA2013017A1/en not_active Abandoned
  • 1990-03-27 US US07/499,954 patent/US5063061A/en not_active Expired - Fee Related
  • 1990-03-31 KR KR1019900004413A patent/KR910000121A/ko not_active Ceased
  • 1990-04-03 DE DE90303565T patent/DE69002414T2/de not_active Expired - Fee Related
  • 1990-04-03 AT AT90303565T patent/ATE91895T1/de active
  • 1990-04-03 DK DK90303565.7T patent/DK0407000T3/da active
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